You may have heard the rumor. Every seven years your body becomes a whole new person. But is there anything to this? Check out this SciShow episode to find out!

Explore autosomal recessive trait and X-linked recessive trait tracking in pedigrees with the Amoeba Sisters! Table of Contents: Intro 00:00 Introducing Symbols/Numbering in Pedigree 0:40 Meaning of Shading in Shapes 1:19 Introducing...

Yapoks are cute aquatic marsupials, and they're the only living creatures that need pouches for their sacs.

Hank shares news about two unusual animals in crisis: the saiga, which have lost about half of their total population in the past month, and the smalltooth sawfish which has been found to reproduce in the wild, without sex.

From something as small and complex as a chromosome to something as seemingly simple as the weather, sex determination systems vary significantly across the animal kingdom. Biologist and teacher Aaron Reedy shows us the amazing...

Bears forgo many activities to conserve their energy in the winter when food is scarce, including eating, peeing, and pooping. There is one thing that they specifically DO do during the winter, though: give birth! But, giving birth...

In 1902, President Theodore Roosevelt legendarily spared the life of a black bear -- and prompted a plush toy craze for so-called "teddy bears." Writer Jon Mooallem digs into this toy story and asks us to consider how the tales we tell...

In which John Green teaches you about Margaret Atwood's speculative fiction novel, The Handmaid's Tale. John looks at some of the themes in this classic dystopian novel, many of which are kind of a downer. The world of Gilead that Atwood...

Great Goddesses: Crash Course World Mythology #13

It's spring where Jessi and Squeaks lives, and that means the air is filled with the sounds of birds singing! But have you ever wondered why birds sing and who they're signing to?

When it comes to sex things can be complicated, but for the three species we are looking at today, sex is really hard.

Waddling along the parched Australian earth, a female platypus is searching for fresh water. Over the past year, a severe drought turned rivers and streams to mere trickles. She barely survived and was unable to reproduce. Could the next...

Hank gets into the dirty details about vascular plant reproduction: they use the basic alternation of generations developed by nonvascular plants 470 million years ago, but they've tricked it out so that it works a whole lot differently...

If you looked at a male and female brain side by side, would you be able to see any differences?

The sun conure, a parrot species, is very social and has some fascinating features. Distinguishing between males and females, however, may come as a challenge.

See what happens when Pygmy hippos and Wolf's guenons interact in one of the world's few mixed species exhibits.

Hornbills have great big beaks – and often bigger casques on top of those beaks – which certainly make it easy to remember their dinosaur origins. But don’t let their appearance intimidate you: at the end of the day, the real defining...

There are a lot of different social structures in the animal world, but how did animals go from solitary to social, let alone from basic interactions to elaborate societies? The small carpenter bee may be just the beast to tackle this...

Indonesian women have equal rights with men by law, and increasingly, by custom. The right to vote was granted to women in Indonesia’s constitution. Property and inheritance rights are adjudicated equally in government courts, but...

Under the Grundgesetz (Basic Law), men and women in Germany are guaranteed equal rights. In reality, women and men don’t receive equal pay. In addition, only a handful of women make it to senior management positions. As in most other...

Germany is one of the most densely populated countries in Europe. In fact, in the Rhine-Ruhr Valley, there are no obvious boundaries between cities. It’s just a mass of urban sprawl. Explore commonalities among German cities, which tend...

In France, what's left unsaid is often more eloquent than what is verbalized. Curious about how to read French body language and interpret gestures such as smiles or eye contact? Learn more about how the French subtly use body language...

South Africa’s liberal constitution grants all people equal status, regardless of their gender, race, religion, sexual orientation, or other characteristics. In practice, though, a large segment of the society is committed to preserving...

Although women represent a sizeable percentage of Singapore’s workforce, relationships between men and women on the island tend to be fairly traditional. Learn more about gender roles and the male-female dynamic.